我已经将我的JS运行时安装为Node,并且我已经捆绑了update-ed和bundle install-ed,但我仍然收到此错误:
/Users/macbook/Documents/Studies/Coding/the_back_end/the_odin_project/odin_on_rails/hello_app/config/boot.rb:4:in `require': cannot load such file -- bootsnap/setup (LoadError)
from /Users/macbook/Documents/Studies/Coding/the_back_end/the_odin_project/odin_on_rails/hello_app/config/boot.rb:4:in `<top (required)>'
from /Users/macbook/Documents/Studies/Coding/the_back_end/the_odin_project/odin_on_rails/hello_app/bin/rails:8:in `require_relative'
from /Users/macbook/Documents/Studies/Coding/the_back_end/the_odin_project/odin_on_rails/hello_app/bin/rails:8:in `<top (required)>'
from /Users/macbook/.rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `load'
from /Users/macbook/.rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `call'
from /Users/macbook/.rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call'
from /Users/macbook/.rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client.rb:30:in `run'
from /Users/macbook/.rvm/gems/ruby-2.3.4/gems/spring-2.0.2/bin/spring:49:in `<top (required)>'
from /Users/macbook/.rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load'
from /Users/macbook/.rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>'
from /Users/macbook/Documents/Studies/Coding/the_back_end/the_odin_project/odin_on_rails/hello_app/bin/spring:15:in `require'
from /Users/macbook/Documents/Studies/Coding/the_back_end/the_odin_project/odin_on_rails/hello_app/bin/spring:15:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'
这是我的Gemfile中的内容,
source 'https://rubygems.org'
gem 'rails', '5.1.4'
gem 'puma', '3.9.1'
gem 'sass-rails', '5.0.6'
gem 'uglifier', '3.2.0'
gem 'coffee-rails', '4.2.2'
gem 'jquery-rails', '4.3.1'
gem …有没有办法使用 Ruby 删除数组中的特定重复项？数组示例：
["hello", "removeme", "removeme", "hello", "testing"]
我只想删除"removeme"该数组上的重复项。期望的输出是：
["hello", "removeme", "hello", "testing"]
有没有这样的方法来获得所需的输出？["hello", "removeme", "removeme", "hello", "testing"].uniq('removeme')
我有一个带字符串值的嵌套数组:
a = [["2000", "2004"], ["2005", "2007"]]
我正在将值转换为整数,如下所示:
int_val = []
a.each do |a|
int_val << a.map(&:to_i)
end
int_val #=> [[2000, 2004], [2005, 2007]]
有没有简短的解决方案或一行代码？[["2000", "2004"], ["2005", "2007"]].map(&:to_i)不管用.
我使用的是最新的支撑设计：28，alpha3。
我使用“Theme.MaterialComponents.Light.NoActionBar”作为我的应用程序的主题和“ MaterialButton” ”而不是普通的“Button”。
我可以像平常一样从 XML 设置 BackgroundTind，但无法通过 java 更改它。
我试过：
deliverSwitch.setBackgroundTintList(getResources().getColorStateList(R.color.colorYellow));
deliverSwitch.setSupportBackgroundTintList(getResources().getColorStateList(R.color.colorYellow));
但它们都不起作用...我还尝试通过将 setBackgroundTintList 保留为空来清除当前色调，但它也不起作用。